7.8 Zone Identification

Expressions that identify the zone an opening is associated with, e.g. door, window, skylight, opening. These must be prefixed with the name of one of these types, e.g. door.toSpace

It is not sufficient to simply write toSpace or fromSpace – they should be followed by the an expression requesting some specific attribute or property of the space, e.g. door.space.category

Refer to sections 7.9 and 7.10 for details of geometry and attributes specifically related to zones.

toSpace	The space a door/window opens into, e.g. element.toSpace.name
FromSpace	The space a door/window opens out from, e.g. element.fromSpace.name